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400203 — 400203

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

400203: 400203.

The 400203 is a the manufacturer industrial component. Key specifications include special_features: PWB 1,MICROCHIPS MULTIPLE;DUAL PORT RAM CARD, features_provided: ELECTROSTATIC SENSITIVE, end_item_identification: MARK IVB, criticality_code_justification: CBBL. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-986-0531, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO→ MRO_GENERAL→ 400203
NSN: 4820-00-986-0531
NIINs: 009860531, 013383788, 015457602
FSC: 4820 — Valves, Nonpowered
CAGE: 31949 — BROOKS AUTOMATION, INC. DIV CTI CRYOGENICS (USA)
SPECIFICATIONS
special_featuresPWB 1,MICROCHIPS MULTIPLE;DUAL PORT RAM CARD
features_providedELECTROSTATIC SENSITIVE
end_item_identificationMARK IVB
criticality_code_justificationCBBL
NSN4820-00-986-0531
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 400203 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE SEAT TO DISK END HEIGHT: 0.031 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 0.805 INCHES MINIMUM AND 0.809 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.805 INCHES MINIMUM AND 0.809 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.150 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
•
UNDER FLANGE HEIGHT: 0.331 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
•
SEATING SURFACE SHAPE: ANGULAR
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.031 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
FLANGE DIAMETER0.805 INCHES MINIMUM AND 0.809 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.805 INCHES MINIMUM AND 0.809 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.150 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
UNDER FLANGE HEIGHT0.331 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
SUBSTITUTES & CROSS-REFERENCES 1
A1N203Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 400203?
400203 is a 400203. It is classified as a MRO (MRO_GENERAL).
What parts can replace 400203?
There is 1 known substitute for 400203: A1N203. Substitute compatibility should be verified for your specific system.
What is the NSN for 400203?
400203 is cataloged in the U.S. Government catalog under NSN 4820-00-986-0531. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.